| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [prep] existence for | 17 |
|
| 2 | has been in existence for | 17 |
|
| 3 | has been in existence for | 17 |
|
| 4 | has been [prep] existence for | 17 |
|
| 5 | has been [prep] existence for | 17 |
|
